Awesome! When I have the time, I’ll test 
(most busy time of the year for my company at the end of the year)
[update 2019-12-06]
As one could have guessed, I couldn’t resist 
I have tried it and it works. I do have the impression the request is “a bit intensive” as the response is slower than without the extra “&computed_coordinates&includes=cca” (I even got a timeout). I already had plans to buffer the data, this helps massively to make the process more simple (a lot less requests).
Next step for me is to get the sequences I need and massively reduce the amount of points and draw lines in the MapilleryJS via lat/lon. That way I can reduce the load and data traffic massively so that the project I’m working on will become much more responsive (it is quite sluggish now).
Up until recently it was only possible to draw lines via the image x/y coordinates. I asked Mr Oscar Lorentzon for the possibility to use lat/lon and he recently implemented it!
So I think I (for) now have all the building blocks I need for the “front end”… the ball is in my court now